When you have a VCR with a tracking problem and after you adjust the video tapepath guide post ,using a commercially recorded tape, and have centered the tracking front panel control, you wind up with a VCR that is not record compatible with other VCR's. Do I put my oscilloscope probe on the output of video head preamp? I think the waveform needs to be flat along the top of the video head signal.More times than not I never have a schematic. I apologies if this is a elementary question, but this is why I join this group, to learn from the more experience Tech's. Darrell Goodrich/ Goodrich Electronics Lubbock,Texas goodrich@xxxxxxxxxxxxxx ------------------------------------------ To REMOVE your email address, click here: http://www.tech-assist.org/unsubb.html ------------------------------------------ ***NEW*** Tips Added Instantly!!!*** Submit Repair Tips here: http://www.tech-assist.org/secure/tip/